I think that I'd go with the small leather pouch/pocket watch holder. Like you I think the idea of putting your good pocket watch into the sporran to be jostled about with keys, pocket knife, coins, etc. will not be good on the case of your fine watch. Someone suggested tucking it into the top of your kilt, but I personally would be worried about sweat damage, here in the humid midwest cornfield summers that would be an issue with me. However the small pocketwatch leather pouch would protect your watch from scratches and moisture, and look pretty good too. Maybe you could find one with a celtic knot or cross carved (stamped) into the cover? Any hoo, just my two cents worth.